NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' control to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
References
| Link | Resource |
|---|---|
| https://my.f5.com/manage/s/article/K000161028 | Mitigation Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
18 Jun 2026, 14:07
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
F5 nginx Open Source
F5 nginx Ingress Controller F5 nginx Instance Manager F5 dos F5 waf F5 nginx Gateway Fabric F5 nginx Plus F5 |
|
| References | () https://my.f5.com/manage/s/article/K000161028 - Mitigation, Vendor Advisory | |
| CPE | cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:* cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:* cpe:2.3:a:f5:dos:4.8.0:*:*:*:*:nginx:*:* cpe:2.3:a:f5:dos:*:*:*:*:*:nginx:*:* cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:* |
13 May 2026, 16:27
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-13 16:16
Updated : 2026-06-18 14:07
NVD link : CVE-2026-42934
Mitre link : CVE-2026-42934
CVE.ORG link : CVE-2026-42934
JSON object : View
Products Affected
f5
- dos
- nginx_open_source
- nginx_plus
- nginx_ingress_controller
- nginx_gateway_fabric
- nginx_instance_manager
- waf
CWE
CWE-125
Out-of-bounds Read